P3D v4Sceneries causing CTD

I have several sceneries from SkyDesigners representing French military airbases. All of the sceneries work fine in FSX-SE and P3Dv3. The sceneries are all very texture intensive with hundreds of 4K textures.

None of the sceneries use SODE or have any dlls associated with them.

Of the 6 sceneries, 4 cause a CTD within a minute or so of spawning an aircraft at them. 2 of the sceneries are working fine (and look beautiful in v4).

My questions are:

1) Are there FS2004 scenery elements in these sceneries that would work in FSX but cause a CTD in v4?

2) How would you go about troubleshooting which scenery elements could be causing this?

3) Are there any specific legacy scenery elements that are known to cause an issue in v4?

After troubleshooting for about 4 hours, I can say with absolute certainty that the issue was Henrik's Global AI Ship traffic.

The symptom was...when sitting in a parking spot at one of the affected airports (let's use LMFY Salon de Provence), going to the locked spot view and panning around would cause the CTD within about a minute. Log files only showed that Prepar3d.exe was unresponsive and had been closed. This behavior was very repeatable and did not vary with different aircraft.

So here is my troubleshooting..
1) With all SkyDesigners scenery disabled, I set up a saved flight at the default LMFY, parking spot 3. While setting this up, it rapidly became apparent that the CTD was happening with the default scenery too. Yes, weird....was able to repeat this several times.

2) Backed up my existing Prepar3d.cfg and allowed a new one to be built. Using the saved flight, the sim did not crash when panning in locked spot.

3) Started making changes to each section (General, Information, etc) of options, one section at a time. After changing one section, loaded the save flight and did the panning. No CTD on setting the texture sizes, lighting, autogen, or other processor intensive settings.

4) However, when I set the traffic sliders to my liking (from 0%, the default in auto created Prepar3d.cfg), the sim would crash with the panning test.

5) Deleted the Prepar3d.cfg again, ran the sim and went to the traffic settings. Started modifying them one at a time, with each time applying the pan test. No crashes until I adjusted the Ship/Ferry traffic. I have 2 ship traffic addons installed: Henrik's and Haze Grey Studios.

6) De-activating Henrik's traffic files (I have them in an addon.xml config), leaving HGS enabled and the sim passed the pan test with no CTD.

Well that sounds more like a conflict, as either one worked independently of the other. Henrik's stuff is thoroughly tested, I'd blame a conflict related to something with the older sceneries, maybe a FS9 traffic file or something.

If you have only installed Henrik's version 1 ("global_ai_ship_traffic_v1.zip"), there are a few FS9 native models (4 iirc), they can cause issues in P3DV4. These models have been replaced in the latest addendum, "200_ai_ship_and_ai_ship_traffic.zip".

Well that sounds more like a conflict, as either one worked independently of the other. Henrik's stuff is thoroughly tested, I'd blame a conflict related to something with the older sceneries, maybe a FS9 traffic file or something.

If you have only installed Henrik's version 1 ("global_ai_ship_traffic_v1.zip"), there are a few FS9 native models (4 iirc), they can cause issues in P3DV4. These models have been replaced in the latest addendum, "200_ai_ship_and_ai_ship_traffic.zip".

Try to remove the four ship folders below - the most likely is a problem from installation:
AI_AC_Sailboat
AI_Calypso
AI_John_T_Essberger
AI_La_Recouvrance
Next reactivate the traffic.
Where do the problem occur? Place and weekday will allow to identify the problem if it is the AI Ships. it is highly unlikely that a traffic.bgl causes the problem. But the four above FS9 models will cause a CTD in P3Dv4 if they are not replaced.

Try to remove the four ship folders below - the most likely is a problem from installation:
AI_AC_Sailboat
AI_Calypso
AI_John_T_Essberger
AI_La_Recouvrance
Next reactivate the traffic.
Where do the problem occur? Place and weekday will allow to identify the problem if it is the AI Ships. it is highly unlikely that a traffic.bgl causes the problem. But the four above FS9 models will cause a CTD in P3Dv4 if they are not replaced.